The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Feb. 21, 2012

Filed:

Nov. 30, 2007
Applicants:

Ryo Umeyama, Kariya, JP;

Toshiro Fujii, Kariya, JP;

Kazuho Yamada, Kariya, JP;

Manabu Ishikawa, Kariya, JP;

Inventors:

Ryo Umeyama, Kariya, JP;

Toshiro Fujii, Kariya, JP;

Kazuho Yamada, Kariya, JP;

Manabu Ishikawa, Kariya, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 27/00 (2006.01); F01D 17/14 (2006.01); F01D 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A centrifugal compressor for compressing gas has a casing, a rotary shaft, an impeller, a diffuser, a first scroll, a second scroll, a first passage, a second passage, and a switching member. The rotary shaft is supported by the casing. The impeller is rotatably fixed to the rotary shaft, and sends the gas radially outward to a flow path downstream thereof. The diffuser is formed around the impeller. The first scroll is formed around the diffuser. The second scroll is formed between the diffuser and the impeller. The first passage is formed from the impeller to the first scroll through the diffuser. The second passage is formed from the impeller to the second scroll. The switching member switches the flow path between the first passage and the second passage by opening and closing the diffuser.


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